Regrinding machine



Feb. 24, 1925.

E. GRAY REGRINDING MACHINE Filed on 20. 1922 s Sheets-Sheet 1 ATTORNEYS Feb. 24, 1925. v 1,527,357

E. GRAY REGRINDING MACHINE Filed on. 20, 1922, s Shee ts-Sheet 2 I I T Q E a E z W.

WITNESSES INVENTOR 4 v .23: G en 5 5M Afro/Mrs Feb. 24, 1 925. 7 1,527,357

w E. GRAY v maximums maxim:

mm oct'. 20, 1922 r 3 Sheets-Sheet :5

INVENTOR A TTORNEYS Patented Feb. 24, 1925.

UNITED STATES ERNEST GRAY, 0F LOGAN, UTAH.

REGRINDING MIACHINE.

Application filed October 20, 1922. Serial No. 595,830.

To all 1071 am it may concern Be it known that I, ERNEST GRAY, a citizen of the United States, and a resident of Logan. in the county of Cache and State of Utah, have invented certain new and useful Improvements in Regrinding Machines, of which the following is a specification.

This invention relates to regrinding Inachines for the cylinder walls of combustion engines.

An object of this invention is the proviprovision of a device having a grinding or honing wheel which is adapted to have a planetary movement and a rotary movement while being moved vertically downward \vitl'iin an engine cylinder. The device includes means for causing the grinding wheel to be revolved and moved vertically downward or upward by a motor incorporated in a movable table which carries the grinding wheel with manual means for raising or lowering the grinding wheel.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification, and in which like reference numerals designate like parts throughout the same,

Figure 1 is a side elevation of my improved grinding or honing machine mounted on a cylinder block of an internal combustion engine.

Figure 2 is a front end elevation of the same.

Figure 3 is a rear end elevation of the internal Figure 4; is a vertical section showing in detail the mechanism for raising or lowering the table.

Figure 5 is a horizontal section taken along the line 5-5 of Figure 3.

Figure 6 is an enlarged view in section of the motor and its connections with the grinding table.

' Figure 7 is a plain view of the motor and the connections shown in Figure 6.

Figure 8 is an enlarged detail view in section showing the slip-joint connection between the motor and operating shaft on the main frame.

Figure 9 is an enlarged detail view showing the operative connection between the main vertical drive shaft and a screw for lifting the grinding meansJ Referring to the drawings, a supporting frame comprising a pair of V-shaped standards 1 and 2 connected at their lower ends by spaced transverse bars 8* is slidably mounted on a base plate 3. The base plate is provided with a pair of aligned slots 4 through which are inserted bolts 5 with the heads resting on the base plate 3 while the bolts project downwardly into the engine cylinders 6 and 6.

Mounted 011 the bolt 5 is a cone-shaped slidable clamping member 7 and a cone shaped clamping member 8 having a threaded engagement with said bolt. A ring 9, which is triangular shape in cross section is adapted to be located between the cones 7 and 8. As the bolts 5 are tightened the cones 7 and 8 will be drawn together and force the ring 9 outwardly and into gripping engagement with the walls of the cylinders 6 and 6*.

As shown more particularly in Figures 2 and 3 the bars 3 at opposite ends of the frame are provided with undercut grooves which are adapted to receive a complemental projection on the base plate 3 whereby the frame, which comprisestwo standards and the cross ba'rs, is adapted to slide on the base plate 3.

A screw 10 mounted in a bracket 11 formed on the inner end of the base plate 3 is adapted to be operated by ahandle 12 for moving the frame longitudinally of the engine block.

The micrometer 13 is mounted on the bracket 11 whereby the adjustment of the frame may be known.

Slidably mounted on the forward edges of the standards 1 and 2 is a table 14. Said table is provided with uprights and 16 having longitudinal grooves therein receiv.

ing the forward beveled side edges of the standards 1 and 2. The upright members 15 and 16 are connected at their lower ends by a transverse member 17 having undercut grooves adapted to receive the complemental ribs in one end of the table 14 whereby the table 14 is slidable transversely of the upright members 15 and 16.

As shown in Figure 2, the uprights 15 and 16 are further connected by spaced transverse bars 18 and 19.

The table 14 is provided with a bearing for the reception of a sleeve 20 having at one end a spur gear 21 forming a support for an electric motor 22. Said motor is provided with a depending shaft 23 driven by said motor with a grinding wheel 24 located at the lower end of the shaft 23, and as shown more particularly in Figure 1 the motor is pivoted at 25 on the gear 21 and is provided with an adjustable connection at a diametrically opposite point with the gear. Shaft 23 is located within a housing 23. Said adjustable connection comprises a lug 26 having a threaded perforation adapted to receive a threaded screw 27, the other end of the screw being received by a threaded perforation in the lug 28 on the motor casing. By adjusting the screw 27 the shaft 23 and likewise the grinding wheel 24 will be moved relative to the center of the gear 21 so that upon rotation of the shaft 23 and the wheel 24, said wheel 24 will have a planetary motion relative to th axis of an engine cylinder which it is grinding.

The motor 22 will likewise revolve around the longitudinal axis of a cylinder while revolving on its own axis, due to the rotation of the gear 21 through mechanism which will be presently explained.

A shaft 30 is provided with a screw 31 meshing with a worm gear 32 which is mounted on a shaft 33. The gear 32 and screw 31 are encased within a housing 34 which is supported upon the shaft 30 but is stationary relative to the shaft 30 and the gear 32 but due to the planetary movement of the motor 22 said housing likewise has a planetary movement relative to the longitudinal axis of an engine cylinder.

The shaft 33 has a sliding connection with a sleeve 37 mounted in the hub of a gear 38 which is adapted to mesh with a gear 39 which is mounted on and revolves the shaft 36. The gears 38 and 39 are mounted in a housing which is swingable on the shaft 36, the swinging movement of the housing 35 compensating for the planetary movement of the housing 34. The shaft 36 is mounted for rotation in bearings which are connected with the transverse bars 18 and 19, forming part of the unit included in the table 14. On the lower end of the shaft 36 is rigidly mounted a gear 40 which is in mesh with the gear 21 so that rotary motion through the shaft 30, worm 31, worm gear 32 shaft 33, gears 38 and 39 and shaft 36 is transmitted by these elements to gear 21 for causing a planetary movement of the motor 22 and rotation of the gear 21. The gears 38 and 39 and the shaft 36 move downwardly or upwardly with the table 14.

As shown in Figure 1, electric wires 41 and 42 are connected with the motor and with a suitable source of current for driving the motor 22.

Mounted for rotation at certain times in the frame and between'the standards 1 and 2 is a screw 43 extending from the base plate 3 to the top 44 of the frame A handle is connected with the screw 43 for manually rotating the same. A micrometer adjustment 46 is connected with the screw whereby the proper position of the grinding wheel 24 may be had. A pin 47 passing through the top 44 of the frame and the screw 43 is adapted to hold the screw against rotation when the motor 22 is operated.

A threaded nut 48 shown more particularly in Figure 4' is mounted for rotation on the screw 43. A sleeve 49 is slidably mounted on the nut and is adapted to en gage a key 50, whereby the sleeve and nut are locked together for simultaneous rotation. The upper end of the sleeve is provided with a plurality of teeth 51 adapted to engage complemental teeth 52 on the lower end of the bevelled gear 53 which is slidable on the screw 43 and provided with the usual bearings 53 on the upright me1nhers 15 and 16 for maintaining the bevelled gear in a fixed position relative to the table. Another bevelled gear 54 spaced from the gear and adjacent the opposite end of the sleeve 49 is slidable on the screw 43 and is likewise provided with bearings 54 formed on the uprights 15 and 16 for maintaining the gear 54 in a fixed position relative to the table 14. A. bevelled gear mounted on the end of a shaft 56 meshes with the gears 53 and 54' for causing rotation of said gears. Means are provided for shifting the sleeve 49 upwardly in order that the cooperating teeth 51 and 52 will en gage and cause rotation of the nut 48. Retation of the nut 48will move the nut downwardly on the screw 43 and carry the table 14 downwardly and likewise the grinding wheel 24. Downward movement of the sleeve 49 will lock said sleeve with the gear 54 and therefore cause reverse rotation of the nut 48 and thereby elevate the table. The shaft 56 extends inwardly from the upright member 15 of the table and is provided with spur gears 57 and 58 of different sizes. A bevelled gear 59 rigid on a shaft 62 which is suitably mounted in bearings on the uprights 15 and 16 is in neck with the gear 39. A pair of gears 60 and 61 are adapted to be moved on the shaft (52 for causing the gear 61 to mesh with the gear 57 or the gear 60 to mesh with the gear 58 and thereby either reduce or increase the speed of the nut 48 shown in Figure 4 and likewise the vertical movement upwardly or downwardly of the table 14-.

Ahandle 63 connected with a horizontal screw 64; is adapted when rotated to move the table 14; horizontally and transversely of the cylinder blocks 6 and 6 The move ment ofthe table transversely of the cylinders is restricted but since slight adjustnients only are needed, the movement may be limitedwithout causing any strain on the connected and released parts.

The operation of my device is as follows:

The frame is mounted upon the cylinder block after the block has been removed and the bolts 5 are properly adjusted in order to cause the clamping means inserted within the cylinders 6 and 6 to grip the inner walls of the cylinders and maintain the frame in fixed position on the block. The handle 12 is operated until the grinding wheel 24; is located centrally on the cylinder 6.

The operating arm 63 is also actuated to cause the screw 64 to adjust the table transversely of the block and therefore further complete the centralization of the wheel 24- with respect to the cylinder 6 The pin 47 is removed and the handle 45 is operated until the grinding wheel is located adjacent thetop edge of the cylinder 16. The pin 47 is then replaced and the motor 22 is started by turning the switch 65., The operation of the motor causes the shaft 23 to be rotated and likewise the wheel 24-,

The shaft 30 connected with the motor at its upper end is likewise rotated with the worm 31, gear 32, shaft 33, gears 38 and 39, shaft 36, spur gears 57 and 58 and large spur gear 21. Rotation of gear 21 causes a planetary movement of the motor relative to the'longitudinal axis of the cylinder 6* since the-motor, through the adjustment screw 27 is moved out of the center of the gear 21. This planetary motion of the motor 22 likewise causes a planetary motion of the grinding wheel 24 and therefore causes the grinding wheel'to engage all parts of the cylindrical wall of the cylinder to which it has been applied.

By shifting the collar 49 to its proper position the respective gear locked to the collar will cause rotation of the nut 48 and likewise cause a downward movement of the table 14 and the grinding wheel 24-. When the grinding wheel has reached its limit of downward vertical movement the position of the collar 4.9 is reversed when the grinding wheel and motor and likewise the table 14- will be returned to the normal upright position.

The inner end of the shaft 62 is located in an opening 69 in a sleeve 62 which is slidably mounted on the shaft 36 and within the housing or yoke The sleeve 49 is provided with teeth G? at its lower end engageable with teeth (38 on the gear so that as the sleeve 49 is shifted down *ardly by a yoke engageable with the pins projecting diametrically opposite from the rollar 66, the gear 54 will cause rotation of the nut 18 and thereby cause an upward or downward movement of the table 14:. 7

hat I claim is:

1. In a device of the class described, the combination of a support adapted to be removably secured to an engine casting, a table slidably mounted on the support, a gear mounted for rotation on the table and provided with a central opening, an electric motor having a casing pivoted at one end to the gear, adjustable means on the gear and casing for placing the motor eccentrically with the gear, a shaft driven by the motor and depending through. the opening in the gear, a rotary grinder on the lower end of the shaft rotated by the motor, a shaft projecting upwardly from, rotated by the motor, and provided with a worm, a worm gear in mesh with the worm, a housing enclosing the worm and worm gear pivotally mounted on the shaft, a horizontal shaft driven by the worm gear, a gear mounted on the table and having connection with the horizontal shaft, a vertical shaft mounted for rotation on the table, a gear mounted on the shaft and in mesh with the last mentioned gear, a gear mounted at the lower end of the s-ihaft and driven thereby, said gear meshing with the gear that supports the electric motor whereby said gear and motor are rotated, a screw mounted on the support, means operatively connecting the table with the screw, means on the screw for rotating the same, said means being operatively connected with the vertical shaft whereby rotation of the shaft causes rotation of the means on the screw whereby a vertical movement of the table is had. a

2. In a device of the class described, the combination of a support adapted to be removably secured to an engine casting, a table slidably mounted on the support, a gear mounted for rotation on the table and provided with a central opening, an electric motor having a casing pivoted at one end to the gear, adjustable means on, the gear and casing for placing the motor eecentrically with the gear, a shaft driven by the motor and depending through the opening in the gear, a rotary grinder on the lower end of the shaft rotated by the motor, a shaft projecting upwardly from, rotated. by the motor, and provided with a worm, a worm gear in mesh with the worm, a housing enclosing the worm and worm gear pivotally mounted on the shaft, a horizontal shaft driven by the worm gear, a gear mounted on the table and having connection with the horizontal shaft, a vertical shaft mounted for rotation on the table, a gear mounted on the shaft and in mesh with the last mentioned gear, a gear mounted at the lower end of the shaft and driven thereby, said gear meshing with the gear that supports the electric motor whereby said gear and motor are rotated, a screw mounted on the support, means operatively connecting the table with the screw, means on the screw for rotating the same, said means being 0peratively ronnectcd with the vertical shaft whereby rotation of the shaft causes rotation of the means on the screw whereby a vertical movement of the table is had, said last named means including a nut mounted for rotation on the screw and connected with the table for causing said table to be moved upwardly or downwardly, gears slida'bly mounted on the screw for causing rotation of the nut in opposite directions, and clutch means on the nut adapted to engage the gears for causing reverse movements of the table.

3. In a device of the class described, the combination of a support adapted to be removably secured to an engine casting, a table slidably mounted on the support, a gear mounted for rotation on the table and provided with a central opening, an electric motor having a casing pivoted at one end on the gear. adjustable means on the gear and casing for placing the motor eccentrically with the gear, a shaft driven by the motor and depending through the opening in the gear, a rotary grinder on the lower end of the shaft rotated by the motor, and means operatively connecting the motor and the gear for causing rotation of said gear.

4. In a device of the class described, the combination of a support adapted to be removably located on an engine casing, a gear operatively mounted onthe support, a motor mounted on the gear, a shaft driven bythe motor and projecting through an opening in the gear, means operatively connected with the motor for eccentrically placing the motor on the gear and for causing said motor and shaft to have a planetary movement.

5. In a device of the class described, the

combination of a support adapted to be removably located on an engine casing, a gear operatively mounted on the support, a motor mounted on the gear, a shaft driven by the motor and projecting through an opening in the gear, means operatively connected with the motor for eccentrically placing the motor on the gear and for causing said motor and shaft to have a planetary movement, and means operatively connected with the motor for causing said motor and shaft to be moved vertically and simultaneously with the planetary movement.

6. In a device of the class described, the combination of a support adapted to be re movably located on an engine casing, a gear operatively connected on the support, a motor mounted on the gear, a shaft driven by the motor and projecting through an opening in the gear, means operatively con nected with the motor for eccentrically placing the motor on the gear and for causing said motor and shaft to have a planetary movement, and means for shifting the motor and shaft horizontally along its support.

7. In a device of the class described, the combination of a support adapted to be removably located on an engine casing, a gear operatively connected on the support, a motor mounted on the gear, a shaft driven by the motor and projecting through an opening in the gear, means operatively con nected with the motor for eccentrically plac ing the motor on the gear and for causing said motor and shaft to have a planetary movement, means operatively connected with the motor for causing said motor and shaft to be moved vertically and simultaneously with the planetary movement, and means'for shifting the motor and shaft horizontally and transversely of the support.

8. In a device of the class described, the combination of a support adapted to be removably located on an engine casing, a gear operatively connected on the support, a motor mounted on the gear, a shaft driven by the motor and projecting through an opening in the gear, means operatively connected with the motor for eccentrically placing the-motor on the gear and for causing said motor and shaft to have a planetary movement, means operatively connected with the motor for causing said motor and shaft to be moved vertically and simultaneously with the panetary movement, means for shifting the motor and shaft horizontally and transversely of the support, and means for shifting the motor and shaft horizontally and transversely of its last mentioned movement.

ERNEST GRAY. 

